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' J. G; GILBERT.

'-Vapor Lamp. v v No. 18,142. Ptented Sept. 8, 1857.

UNITED STATES PATENT OFFICE.

JOSEPH G. GILBERT, OF NEW YORK, N. Y,

VAPOR-LAMR Specification of Letters Patent No. 18,142, dated September8, 1857.

To all whom it may concern:

Be it known that I, JosEPH G. GILBERT, of the city, county, and State ofNew York, have invented a new and Improved Self- Generating Gas-Lamp;and I do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawingsand to the letters of reference marked thereon.

The nature of my invention consists in surrounding the wick tube withcork and sulfur in such a manner as to prevent the wick tube coming indirect contact with any portion of the lamp, thereby confining the heatto the wick tube through the intervention of the cork and sulfur, bothof which are non or poor conductors of heat; also a peculiar formedburner as hereinafter described, which burner screws on or within thewick tube.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

I use a lamp of any of the known forms, see letter A in the accompanyingdrawings, drill a hole through the top B of said lamp in the center,somewhat larger than the wick tube C, shape a piece of cork into aconical formof such proportions that the base will enter within thescrew of lamp top B, from thence tapering to the end or nearly so of thewick tube C, see accompanying drawings, letter D, form a conical shapedcylinder E withoutits apex of such proportions that the base will be ofthe same diameter as the screw of lamp top B and of suflicient length toextend to the end of wick tube C, so that when slid over the cork D aspace will be left between the cork D and the cylinder E. The wick tubeC is passed through the lamp top B, so as to nearly reach the bottom ofthe lamp when the top B is screwed down in its place. The cork D havinbeen pierced is slid over the wick tube the base entering within thescrew of top B, the cylinder E is slid over the cork Dand the basesoldered to the screw of top B. Fused sulfur G is then poured into thespace between D and E, which binds the whole compactly.

The heater F is made from metal tubing sawed transversely, so as to formtwo rings equally distant but joined on one side by leaving a portion ofthe tube unsawed. Under this joining is soldered a cap of sufficientsize to screw over the end of wick tube, see letter F, take a gas burnertip H that will admit of or emit a flame of the bat wing or fish tailshape, pass such burner tip H through the cap F and joining (afterpiercing and cutting a thread in the same and a corresponding one on gasburner tip H, which tip II should be flush with the inside of cap F andproject outside betweenthe rings about one quarter inch). The rings areintended to be sufiicientlv distant apart to receive the heat of the gasjet without the flame coming in contact with them. Introduce a piece ofwicking I by means of a wire and the lamp is ready for use. In thusdescribing its construction I do not Wish to confine myself to anyparticular manner of arranging the cork and sulfur, as they can be madeto produce the same results by different devices, such as changing theirrelative position to the wick tube, or by dispensing with the outercylinder by dipping the wick tube and cork in the fused sulfur, coatingthem as thick as desirable, and in many other ways using the combinationof the cork and sulfur. Neither do I wish to confine myself to anyparticular form of gas tip burner in connection with my invent-ion.

I do not claim the use of cork alone. Nor do I claim the outer cylinder,as they are both old devices. Neither do I claim the form of the ringseparately as a part of the heater or burner.

hat I do claim and wish to secure by Letters Patent of the United Statesis The combination of sulfur and cork in the manner and substantiallyfor the purposes set forth.

JOSEPH G. GILBERT.

Witnesses: i

JOHN L. FYFE, HERMAN PETOOK.

